Hi, I don't have time right now to dig into this and see what's wrong, but if you do
random_matrix(QQ, 7,4, algorithm='subspaces') almost always it fails, saying that the rank cannot exceed the number of rows or columns. The documentation says the rank is generated randomly, so it seems like the relevant function (random_subspaces_matrix) should be smart enough to generate a rank that is possible for the given dimensions. Sometimes it works, but most of the time it fails with an impossible rank. I've created http://trac.sagemath.org/ticket/18384. (If this is somehow not a bug, let me know and I'll close the ticket.) Dan -- --- Dan Drake ----- www.math.wisc.edu/~ddrake/ ------- -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
signature.asc
Description: Digital signature
